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ESI - Model EDX-8000 SDD - XRF Gold Tester
All the noble metals can be analyzed in a short period of time with high accuracy, precision and reliability. The virtue of its simplicity, non-destructive, speed, affordability and reliability are clearly advantageous over traditional wet chemistry (fire assay for example) and other spectroscopic methods. Modern technological developments have also helped to include EDXRF into standard test methods for Jewelry application. With the latest Silicon Drift Detector technology, EDX-8000 ensures the highest precision with the shortest test time. Higher Count rates, better spectrum resolution with small 1mm spot size of collimator are all critical parameters for the gold analysis application, which are all achieved by the EDX-8000 XRF spectrometer. This application note proves that EDX8000 is mature enough to establish clear qualitative and quantitative characterization of the gold value as well as Karat grade.
>Large sample chamber with the best performance Silicon Drift Detector
>Outstanding sensitivity leads to up to a factor 3 improved precision – the basis for high accuracy when analyzing minor to major element concentrations.
>World’s fastest XRF analyze–highest accuracy within the shortest measurement time, excellent precision
>High-count throughput detection system result in significantly (typically a factor 3) lower limits of detection for a wide range of elements.
>Easier, faster, more accurate than nitric acid test methods.
>Faster, more comprehensive analysis than fire assay, with comparable accuracy.
>Measure the content of all gold and precious metals without manually changing the calibration.
>Precisely determine the presence and concentration of other trace alloying elements and dangerous heavy elements, which could impact valuation and future refining needs.
>Detector: High performance SDD
>High CPS readout: 30,000-100,000
>Digital Multichannel Analyzer: 4096 channels
>X-ray excitation system:ØPowerful Berkelium window 50 Watts air cooling X-ray tube
Maximum voltage: 50Kv.
Maximum current: 1000uA.
>Measure time: 30 seconds for final report. 3 seconds gold karat identification.
>Element Range: From Magnesium to Uranium
>Built-in high resolution CCD sample camera
>Power supply: 220-240 V, 50/60 Hz
>Sample chamber size: 410mm*330mm*140mm
>Instrument Size: 500mm*500mm*390mm
EDX 8000 has standard-less fundamental parameters calibration with automatically adjustment for different precious alloys (gold, silver, platinum, Palladium). Five standard curves are calibrated in the EDX8000 for precious metal application.
1.Pure gold curve.
2.Karat gold curve for white, yellow, pink, red and all other gold alloy.
3.Platinum curve.
4.Palladium curve.
5.Sliver curve.
All the curves are auto loaded by the program based on the spectrum shape.
Graph 1-1 is typical gold spectrum with qualitative analysis information
Graph 1-2 is the calibration curve of Gold. Y axis is theoretical intensity. X axis is measured intensity.
>>>R2 is the coefficient of determination which shows how closely measured intensity and calculated theoretical intensity correlate to each other. After fitting a linear regression, the R2 value demonstrate the excellent linear of the calibration curve. In return, The excellent linear calibration curve ensures the wide range test accuracy from low to high karat of gold.
